Hopper for stokers



July 8, V1941. 'r. H. BANFIELD HOPPER Fon sToKERs Filed may 1s, 193s 2 sheets-sheet 1 July` 8, 1941.

, T. H. BANFn-:LD

HOPPER FOR sToKERs Filed May 16, 1938 2 Sheets-Sheet 2 /NENTDR 'LH BANHELD .E

/14' rTDR/ve the floor level.

`the manner rset forth in the following specification as illustrated in l the base and door removed and a portion of the- 'i the hopper in a raised position.

' the manner in which enclosureiadapt. themselves .Patented July HOPPER FOR STOKERS Thomas 'H.Bauiield, Portland, Greg., assignmto Iron Fireman Manufacturing Company,'Port land, Oreg.

Application May 1c, i938, 'sensi 10.208.195

'4 claims. (o1. 11o-10s) This invention relates generally to coal stokers, and particularly to an improved form of enclosure for the hopper and a base for said.A enclosure.

The main object of this invention is to construct an enclosure and-ahopperbase by means of which a coal stoker may be placed upon a sloping floor and thestoker properly leveled, at the same time having its base enclosure in close contact with the floor itself. l

The second object is ,to construct a hopper of the class describedwith a closure having an adjustable base adapted to permit of variations in the relative positions of the feed worm and The third object is to co'nstruct a device of the class described wherein a large portion of the vibrations imparted to the enclosure are absorbed or deadened by the base structure. Y

The fourth object is'to so construct the device as to make it easily possible to varyl the elevation of the stoker with relation to the oor line.

These and other objects are accomplished in l the accompanying drawings, in which:` Fig. l is a perspective view showing the `complete unit in its relation to a furnace.

Fig. 2 is a side elevation of the device showing side cut away.

Fig. 3 is a section taken along Fig. 2.

Fig. 4 is a section taken along Fig. 2. 1

Fig. 5 is a perspective view of the interior of the door. -1

Fig. 6 is a fragmentary section taken along the line6-&inFig.1. FiFigl. 'I is a section taken along the line 1- in s. i Fig. 8 is. a perspective view of one side of a hopper base. I

Fig. 9 is a sectional perspective view taken along the line 8-9 in Flg.1 showing the hopper in a lowered position. v

Fig. 10 is a view similarto F18. 9 but showing the line'B-Jin the une 4 4 m Fig. 11 is a side elevation showing in a somewhat exaggerated manner a sloping iloorand my hopper base and base in dotted lines is shown the-'uppermost level to which the hopper may be raised.

to such floors, also- Fig. 12 is a section ytaken along the line I2-I2 in Fig. 9.

Similar numerals refer to 'similar parts u throughout the several views.

Referring in detailto the drawings, thereis shown a furnace I5 which is connected by means of a coal conveying tube I6 to a hopper base II whichl is provided with adjustable feet I8 which are us'ed for changing its enng purposes.

Coal is fed through coal feeding yworm I9 the tube' I6 by means of a which is driven by a motor 2li through a reduction gearing' contained within the casing'2l. 'Ihe hopper 22 which is above the hopper base I'I may be ofany desired shape. The hopper 22 has formed near its corners the .posts 23 whichhave projecting from the lower ends thereof the rubber bumpers 2l. The posts 23 project below the loweredge 25 of lthe hopl per 22. a

The front 26 of the hopper 22 is provided with a flanged opening 21 in front of which is placeda door 28 having a rubber covered edge 29. ,The door 2t is provided with handles 3l) which are mounted on the rock shafts -3I on the inner ends of which are the latching levers 22. The door 2l is provided with louvers 33 4by means of which air may be drawn into the fan (not shown) through which airis delivered through the ductto the .combustion chamber within the 4furnace n each side of the hopper 22 is placed a base enclosure member having the inturned ends 36 and ILthe former of which extends to the flanged Each member 35 is provided with a pair of revolvable bolts 40. Each bolt I0 has a slottedend 4I on its outer side andhas mounted .on itsl inner inner side of a post 23.

It will be observed that the levers 42 are adapted to engage the inner sides of the posts 22 and since the bumpers are held in compression thereby. it can be seen that vibration is brought to a minimum. It is desirable to bind the upper and lower edges of the members I5 with rubberlinersll. g'

- It can be seenfrom the foregoingthat in the .installation of this device, it is first necessary to raise the upper base I'I to the desired elevation .and thenlevel it by means of the adjustable-feet Il. The members 3l are then put in place and lowered to the noor line and secured by rotating the bolts 40 by means of a screw driver which elevation and for ievedge n of the door 2s' and the latter of which extends around the back 39 of the hopper 22.

end a lever 42 which is adapted to -engage the causes the levers 42 to engage the posts 2l as shown in Fig. l2 placing the resilient bumpers 24 in compression.

It can be noted that the door 2l ilts between the edges 4I of the inturned ends and that the upper end Il ofthe door 2| may assume its proper position with relation to the door opening 21 as 'elevated hopper having means for leveling same,

vertically adjustable sides forming a skirt around the bottom of said hopper, said sides having inturned ends leaving anl opening under one end y 'of said hopper and a door adapted to occupy said sides, a leveling support therefor, basev boards at l vided with a hinged door 4l which is preferably made air tight.

It must be understoodthat the form of this invention illustrated in the drawings and described herein is only representative and that .the details thereof may be varied without de- *parting from thespirit of this invention.

. Iclaim:

-l. In a stoker casing, the combination of an elevated hopper having substantially vertical sides, means for leveling said hopper, a U shaped base board for partially enclosing the bottom of said hopper, means for adjusting said base b oard with relation to said hopper and. a

open end and to extend above said base and a latch for securing said door against the front of said hopper.

3. A stoker casing having in combination an elevated hopper having substantially vertical opposite sides of said hopper having in-turned ends spaced from each other, said base boards being adjustable in a vertical direction, and a door disposed between one pair of base board ends and extending above said base boards, and latches for fastening said base boards and door to said hopper.

4. A stoker having -in combination an elevated hopper having'substantially vertical sides and provided withl comer legs for supporting said hopper, vertically adjustable base boards at opposite sides of said hopper adapted to form closure for the bottom thereof, means for supporting said base boards on said corner legs, and a door adapted to occupy the space between one pair of base board ends and to be secured against said hopper.

. 'THOMAS H. BANFIELD. 

